CN109102795A - A kind of acoustics super lens for realizing the imaging of depth sub-wavelength - Google Patents
A kind of acoustics super lens for realizing the imaging of depth sub-wavelength Download PDFInfo
- Publication number
- CN109102795A CN109102795A CN201811108120.8A CN201811108120A CN109102795A CN 109102795 A CN109102795 A CN 109102795A CN 201811108120 A CN201811108120 A CN 201811108120A CN 109102795 A CN109102795 A CN 109102795A
- Authority
- CN
- China
- Prior art keywords
- acoustic resonator
- imaging
- acoustics
- realizing
- helmholtz
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/18—Methods or devices for transmitting, conducting or directing sound
- G10K11/26—Sound-focusing or directing, e.g. scanning
- G10K11/30—Sound-focusing or directing, e.g. scanning using refraction, e.g. acoustic lenses
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/02—Mechanical acoustic impedances; Impedance matching, e.g. by horns; Acoustic resonators
- G10K11/04—Acoustic filters ; Acoustic resonators
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Transducers For Ultrasonic Waves (AREA)
- Ultra Sonic Daignosis Equipment (AREA)
Abstract
The present invention relates to a kind of acoustics super lens for realizing the imaging of depth sub-wavelength, to realize that the near field depth sub-wavelength of measuring targets is imaged, the acoustics super lens include multiple while having negative effective mass density and bearing the acoustics super-resolution imaging unit of effect volume compressibility, and the acoustics super-resolution imaging unit forms rectangular array according to two-dimension square shape lattice arrangement.Compared with prior art, the present invention has many advantages, such as that structure is simple, effectively amplify evanescent wave, frequency band, higher imaging resolution is imaged in Effective Regulation.
Description
Technical field
The present invention relates to acoustic function Material Fields, super more particularly, to a kind of acoustics for realizing the imaging of depth sub-wavelength
Mirror.
Background technique
Acoustics imaging is a kind of basic skills of the lossless detection structure of matter and ingredient.Traditional acoustic imaging devices due to
The limitation of the diffraction limit of sound wave, the resolution ratio of imaging can only achieve the half of detection wavelength.Largely carried by evanescent wave
Detailed information dissipated near vicinity, can not travel at a distance be imaged.Acoustic function material is a kind of Asia of manual construction
Wavelength structure may be implemented the phenomenon that not having in traditional material and function, effectively regulate and control sound wave.Have simultaneously and bears effect matter
The sound functional material of metric density and negative effective volume compressibility can show negative index, realize super-resolution convergence, referred to as
Acoustics left-handed material.For example, document S.Zhang, L.L.Yin, and N.Fang, Phys.Rev.Lett.102,194301
(2009) and N.Kaina, F.Lemoult, M.Fink, and G. Lerosey, " Negative refractive index
and acoustic superlens from multiple scattering in single negative
Metamaterials, " Nature 525,77 (2015) devises by the super lens of double negative Meta Materials production, and evanescent wave was by should
Structure is enhanced.However, the efficiency of these super lens, bandwidth regulation and sub-wavelength depth also need further to be promoted.For reality
The promotion of existing double negative super lens performances, needs a kind of acoustics super lens for realizing the imaging of depth sub-wavelength.
Summary of the invention
It is an object of the present invention to overcome the above-mentioned drawbacks of the prior art and provide a kind of realization depth Asia waves
The acoustics super lens of long imaging.
The purpose of the present invention can be achieved through the following technical solutions:
A kind of acoustics super lens for realizing the imaging of depth sub-wavelength, to realize the near field depth sub-wavelength of measuring targets
Imaging, the acoustics super lens include multiple while having negative effective mass density and bearing the acoustics super-resolution of effect volume compressibility
Imaging unit, the acoustics super-resolution imaging unit form rectangular array according to two-dimension square shape lattice arrangement.
Each acoustics super-resolution imaging unit includes that an one-dimensional wave guide and setting form fluid company on one-dimensional wave guide
Multiple Helmholtz acoustic resonator to intercouple in logical space, the one-dimensional wave guide of multiple acoustics super-resolution imaging units is in plane
Direction is interconnected and forms two-dimensional waveguide array, and multiple Helmholtz acoustic resonator form two-dimentional acoustic resonator array.
The one-dimensional wave guide of each acoustics super-resolution imaging unit be equipped with a pair of Helmholtz acoustic resonator, two
Helmholtz acoustic resonator is arranged at the side of one-dimensional wave guide vertical direction, and entire rectangular array includes one layer of two-dimentional acoustic resonator
The basic resonant frequency of array layer, all acoustic resonator in the two dimension acoustic resonator array layer is identical.
The one-dimensional wave guide of each acoustics super-resolution imaging unit be equipped with two pairs of Helmholtz acoustic resonator, two pairs
Helmholtz acoustic resonator is separately positioned on the two sides of one-dimensional wave guide vertical direction, and entire rectangular array includes two layers of two-dimentional sympathetic response
The basic resonant frequency of device array layer, all acoustic resonator in same two dimension acoustic resonator array layer is identical, and two two dimensions are total
The basic resonant frequency of acoustic resonator is different in ring device array layer.
The Helmholtz acoustic resonator includes a square cavity and cylindrical neck portion.
Two Helmholtz acoustic resonator are located on the diagonal line of square cavity upper and lower surface.
The basis of Helmholtz acoustic resonator is adjusted by the cavity volume and pore size that change Helmholtz acoustic resonator
Resonant frequency, to adjust the working band of super lens.
By the imaging belt for changing the side length of rectangular array and the coupling spacing adjusting super lens of Helmholtz acoustic resonator
It is wide.
Coupling spacing by changing Helmholtz acoustic resonator adjusts the bandwidth of double minus zones, with the presence or absence of pair minus zones and
The presence or absence of sub-wavelength imaging.
Compared with prior art, the invention has the following advantages that
One, structure is simple:
The present invention by simple structure, construct one kind can be realized in limited tunable band depth sub-wavelength at
The acoustics super lens of picture, the basic unit of the acoustic function material include the Hai Muhuo of at least one two-dimensional waveguide and multiple couplings
The two-dimension square shape lattice array that hereby (Helmholtz) acoustic resonator is constituted can occur when structure is near resonant frequency
Negative refraction band (the same phase resonance mode and the superposition of reverse phase resonance mode generated by acoustic resonator coupling generates).
Two, effectively amplify evanescent wave:
The present invention utilizes isotropic negative refraction acoustic metamaterial, amplifies evanescent wave, evanescent wave lateral wave vector kyIt takes
The band a large amount of detailed information of object are amplified, and are traveled to distal end along super lens and are imaged, and see point of the imaging effectively improved on the whole
Resolution realizes the imaging of depth sub-wavelength.
Three, frequency band is imaged in Effective Regulation:
The present invention can fixed range adjust Helmholtz resonator frequency, adjust the frequency band of effective negative index.Lens
Effective refractive index frequency band it is different, the variation of imaging frequency band may be implemented, can use double-layer structure coupling realize it is efficiently adjustable
The imaging of biobelt depth sub-wavelength, enhance to the detectivity of object.
Four, higher imaging resolution:
Meta Materials lens provided by the invention, the sub-wavelength imaging resolution with depth, experiment measures resolution ratio can be with
Reach λ/26.Higher resolution ratio allows us to detect small nanoscale object using low-frequency acoustic signal, reduces energy loss, improves
Acoustical signal transmission range.
Detailed description of the invention
Fig. 1 (a) is the structural schematic diagram of acoustics super-resolution imaging unit.
Fig. 1 (b) is the 10*1 array structure schematic diagram of acoustics super lens.
Fig. 2 is square two-dimension periodic distributed architecture energy band.
Fig. 3 be first Brillouin-Zone etc. frequent non-dramatic song face.
Fig. 4 is to record acoustic pressure distribution measuring results along the y-axis direction.
Fig. 5 is acoustic density distribution map, wherein figure (5a) is the acoustic density distribution map of 10*1 array, and figure (5b) is 10*
The acoustic density distribution map of 2 arrays.
Fig. 6 is the structure of the acoustics super-resolution imaging unit of the double-deck distribution array.
Fig. 7 is the energy band distribution of the acoustics super-resolution imaging unit of the double-deck distribution array.
Fig. 8 is the distribution of array acoustic density, wherein 10*2 array acoustic density is distributed when figure (8a) is 634.5Hz, figure
10*2 array acoustic density is distributed when (8b) is 664Hz.
Specific embodiment
The present invention is described in detail with specific embodiment below in conjunction with the accompanying drawings.
The present invention has negative effective mass density and bears effect while providing a kind of coupling based on Helmholtz acoustic resonator
There is the acoustics super-resolution imaging structure of volume compressibility coupling evanescent wave a large amount of detailed information of object are transmitted to the other end
The near field depth sub-wavelength imaging (realizing 1/26th wavelength) to object is realized in imaging.The super lens are by multiple
The array of unit periodic arrangement forms, and unit size requires sub-wavelength, and structure is according to two-dimension square shape lattice arrangement.Pass through superposition
The super-resolution imaging of mostly band, spread bandwidth may be implemented in double-layer structure.
Embodiment 1:
Specific structure of the invention is as follows:
As shown in Figure 1, figure is to illustrate the structure of acoustics super-resolution imaging unit.The figure includes two mutually isostructural last of the twelve Earthly Branches
The one-dimensional wave guide of Mu Huozi acoustic resonator and a connection.Waveguide and Helmholtz resonator are tightly connected, and two Helmholtz are total
Ringing, device is asymmetric to be connected in parallel on pipeline side.
As unrestricted example, the typical parameter of one of functional structure of the present invention is as follows: a height of H of rectangular waveguide
=30mm, long and width are that (upper and lower wall thickness and material will guarantee rigid bounds condition to 60mm, and the Floquet period is arranged in side
Property boundary).The neck of Helmholtz resonator is cylinder open, inside radius R=5mm, height H=8mm, the chamber of acoustic resonator
Internal portion is 24mm × 24mm × 54mm cuboid.Two Helmholtz resonators (resonant frequency 672Hz) are in the direction x and y
Distance is 28mm, and material can be any hard material.Fig. 2 gives the energy band of square two-dimension periodic distributed architecture.It can be with
Significantly see Γ Μ and Γ X high symmetry direction, (661Hz-655Hz) occurs near Helmholtz basic resonant frequency
Negative passband.
It is worth noting that, in this example element structure distance of two acoustic resonator in the direction x and y be it is adjustable, should be away from
From the stiffness of coupling determined between double resonance device, further determines the bandwidth of negative effective density and bear effect volume compressibility
The relative position of bandwidth and the two negative bands finally affects lap position and the bandwidth of the two negative bands.What this example was taken
Acoustic resonator spacing is the 28mm chosen after optimizing.
Although structure produces negative band, consider that periodic structure is isotropic in the negative band range of practical application explanation.Cause
This calculate quadratic crystal first Brillouin-Zone etc. frequent non-dramatic song face, as shown in Figure 3.Fig. 3 is the result shows that square profile is brilliant
Body is considered as isotropic effective negative refraction Meta Materials within the scope of 661Hz-657.7Hz.
Specific implementation is as follows:
The super lens that a 10*1 and 10*2 distribution is constructed first with Fig. 1 unit, using microphone in super lens sound wave
Exit end near field records acoustic pressure distribution along the y-axis direction.Measurement result is as shown in figure 4, wait isotropism shown in frequent non-dramatic song face double
There is super-resolution imaging in minus zone.It is wide by comparing acoustic pressure amplitude half height y-axis, when this example gives most narrow 658Hz, amplitude
Half eminence y-axis width is λ/26.We also compare when not putting super lens, and point source is about λ/2 in the amplitude halfwidth of same position.
There is good depth sub-wavelength imaging, and sound pressure amplitude enhances.
In order to can be visually seen the imaging contexts of super prism, the acoustic density in xy section of the observation simulation result along z equal to 1cm
Distribution situation.Fig. 5 gives acoustic density distribution map of the 10*1 and 10*2 array in 658Hz simultaneously, and (figure (5a) is 10*1 times
Column, figure (5b) are 10*2 array.) it can be evident that the opposite of point source above forms the picture of energy enhancing.
Embodiment 2:
We further widen the bandwidth of double minus zones on the basis of the basic structure of Fig. 1 (a), therefore we are total on basis
Identical point that one layer of basic resonant frequency is 640Hz is increased above the Helmholtz acoustic resonator array that vibration frequency is 680Hz
Cloth array.As unrestricted example, the arrangement mode of structure Helmholtz acoustic resonator can be distributed with non-square lattice,
The number of Helmholtz acoustic resonator can be for more than or equal to 20, the shape of Helmholtz acoustic resonator can be non-pros
Shape.Fig. 6 and Fig. 7 gives the energy band distribution of cellular construction figure and unit, in Γ Μ and Γ X high two resonant frequencies of symmetry direction
Nearby there are two double negative bands.The Helmholtz acoustic resonator coupling of 640Hz produces the double negative bands of low frequency end, 680Hz's
The coupling of Helmholtz acoustic resonator produces the double negative bands of front end, and intermediate positive band is that two kinds of Helmholtz acoustic resonator couple to be formed
's.
Fig. 8 is the acoustic pressure distribution that the section xy at z=1.5cm is drawn based on simulation result.Scheming (8a) is 634.5Hz
When 10*2 array acoustic density be distributed, top is a point incidence end, and its picture obviously occurs in lower part antimere.Same high frequency negative
Significantly focusing also occurs in the 664Hz of band.It can be seen that the negative bandwidth of the super lens of double-layer structure obviously increases, height is realized
Effect, high-resolution double negative band depth sub-wavelengths are imaged.
Claims (9)
1. a kind of acoustics super lens for realizing the imaging of depth sub-wavelength, to realize the near field depth sub-wavelengths of measuring targets at
Picture, which is characterized in that the acoustics super lens include multiple while having negative effective mass density and bearing effect volume compressibility
Acoustics super-resolution imaging unit, the acoustics super-resolution imaging unit form rectangle battle array according to two-dimension square shape lattice arrangement
Column.
2. a kind of acoustics super lens for realizing the imaging of depth sub-wavelength according to claim 1, which is characterized in that Mei Gesheng
Learning super-resolution imaging unit includes an one-dimensional wave guide and multiple phases that formation fluid communication space on one-dimensional wave guide is arranged in
The Helmholtz acoustic resonator of mutual coupling, the one-dimensional wave guides of multiple acoustics super-resolution imaging units are interconnected shape in in-plane
At two-dimensional waveguide array, multiple Helmholtz acoustic resonator form two-dimentional acoustic resonator array.
3. a kind of acoustics super lens for realizing the imaging of depth sub-wavelength according to claim 2, which is characterized in that Mei Gesheng
The one-dimensional wave guide for learning super-resolution imaging unit is equipped with a pair of Helmholtz acoustic resonator, and two Helmholtz acoustic resonator are respectively provided with
In the side of one-dimensional wave guide vertical direction, entire rectangular array includes one layer of two-dimentional acoustic resonator array layer, the two dimension acoustic resonator battle array
The basic resonant frequency of all acoustic resonator in column layer is identical.
4. a kind of acoustics super lens for realizing the imaging of depth sub-wavelength according to claim 2, which is characterized in that Mei Gesheng
The one-dimensional wave guide for learning super-resolution imaging unit is equipped with two pairs of Helmholtz acoustic resonator, and two pairs of Helmholtz acoustic resonator are set respectively
It sets in the two sides of one-dimensional wave guide vertical direction, entire rectangular array includes two layers of two-dimentional acoustic resonator array layer, same two dimension sympathetic response
The basic resonant frequency of all acoustic resonator in device array layer is identical, and in two two-dimentional acoustic resonator array layers acoustic resonator base
Plinth resonant frequency is different.
5. a kind of acoustics super lens for realizing the imaging of depth sub-wavelength according to claim 3 or 4, which is characterized in that institute
The Helmholtz acoustic resonator stated includes a square cavity and cylindrical neck portion.
6. a kind of acoustics super lens for realizing the imaging of depth sub-wavelength according to claim 3 or 4, which is characterized in that two
A Helmholtz acoustic resonator is located on the diagonal line of square cavity upper and lower surface.
7. a kind of acoustics super lens for realizing the imaging of depth sub-wavelength according to claim 3 or 4, which is characterized in that logical
It crosses the cavity volume for changing Helmholtz acoustic resonator and pore size adjusts the basic resonant frequency of Helmholtz acoustic resonator, from
And adjust the working band of super lens.
8. a kind of acoustics super lens for realizing the imaging of depth sub-wavelength according to claim 3 or 4, which is characterized in that logical
The coupling spacing for crossing the side length and Helmholtz acoustic resonator that change rectangular array adjusts the imaging bandwidth of super lens.
9. a kind of acoustics super lens for realizing the imaging of depth sub-wavelength according to claim 3 or 4, which is characterized in that logical
Cross the bandwidth for the double minus zones of coupling spacing adjusting for changing Helmholtz acoustic resonator, with the presence or absence of double minus zones and sub-wavelength imaging
The presence or absence of.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811108120.8A CN109102795B (en) | 2018-09-21 | 2018-09-21 | Acoustic super lens for realizing deep sub-wavelength imaging |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811108120.8A CN109102795B (en) | 2018-09-21 | 2018-09-21 | Acoustic super lens for realizing deep sub-wavelength imaging |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109102795A true CN109102795A (en) | 2018-12-28 |
| CN109102795B CN109102795B (en) | 2020-11-27 |
Family
ID=64867140
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811108120.8A Active CN109102795B (en) | 2018-09-21 | 2018-09-21 | Acoustic super lens for realizing deep sub-wavelength imaging |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109102795B (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110584713A (en) * | 2019-09-29 | 2019-12-20 | 深圳先进技术研究院 | Super-resolution ultrasonic microscope |
| CN111613203A (en) * | 2020-06-02 | 2020-09-01 | 黑龙江大学 | Phase-adjusting far-field super-resolution focusing and imaging device |
| WO2021056551A1 (en) * | 2019-09-29 | 2021-04-01 | 深圳先进技术研究院 | Super-resolution ultrasonic microscopy device and application thereof |
| CN114049869A (en) * | 2021-10-21 | 2022-02-15 | 西安交通大学 | Adjustable subwavelength acoustic imaging superlens |
| CN114913842A (en) * | 2022-04-29 | 2022-08-16 | 浙江大学 | Difunctional acoustics plane superlens |
| CN117192795A (en) * | 2023-11-08 | 2023-12-08 | 浙江大学 | Optical waveguide optical module for edge-enhanced imaging and near-to-eye display device |
| CN117192790A (en) * | 2023-11-08 | 2023-12-08 | 浙江大学 | Achromatic vortex superlens and optical waveguide optical module for realizing edge enhancement imaging |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105895074A (en) * | 2016-04-11 | 2016-08-24 | 南京大学 | Acoustic unidirectional hyper surface |
| CN106205584A (en) * | 2016-07-06 | 2016-12-07 | 南京大学 | A kind of broadband noise elimination pipeline of Helmholtz resonator based on adjustable resonant frequency |
| CN106297762A (en) * | 2016-08-16 | 2017-01-04 | 南京工业大学 | Method for changing pass band of acoustic metamaterial by utilizing nonlinear characteristic of Helmholtz resonator |
| CN106782477A (en) * | 2016-12-16 | 2017-05-31 | 江苏大学 | A kind of Helmholtz chambers acoustic metamaterial with membrane structure |
| US20170365248A1 (en) * | 2014-06-15 | 2017-12-21 | William M. Robertson | Acoustic lens using extraordinary acoustic transmission |
-
2018
- 2018-09-21 CN CN201811108120.8A patent/CN109102795B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20170365248A1 (en) * | 2014-06-15 | 2017-12-21 | William M. Robertson | Acoustic lens using extraordinary acoustic transmission |
| CN105895074A (en) * | 2016-04-11 | 2016-08-24 | 南京大学 | Acoustic unidirectional hyper surface |
| CN106205584A (en) * | 2016-07-06 | 2016-12-07 | 南京大学 | A kind of broadband noise elimination pipeline of Helmholtz resonator based on adjustable resonant frequency |
| CN106297762A (en) * | 2016-08-16 | 2017-01-04 | 南京工业大学 | Method for changing pass band of acoustic metamaterial by utilizing nonlinear characteristic of Helmholtz resonator |
| CN106782477A (en) * | 2016-12-16 | 2017-05-31 | 江苏大学 | A kind of Helmholtz chambers acoustic metamaterial with membrane structure |
Non-Patent Citations (1)
| Title |
|---|
| XISHAN YANG ETC: "Acoustic superlens using Helmholtz-resonator-based metamaterials", 《APPLIED PHYSICS LETTERS》 * |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110584713A (en) * | 2019-09-29 | 2019-12-20 | 深圳先进技术研究院 | Super-resolution ultrasonic microscope |
| WO2021056551A1 (en) * | 2019-09-29 | 2021-04-01 | 深圳先进技术研究院 | Super-resolution ultrasonic microscopy device and application thereof |
| CN111613203A (en) * | 2020-06-02 | 2020-09-01 | 黑龙江大学 | Phase-adjusting far-field super-resolution focusing and imaging device |
| CN111613203B (en) * | 2020-06-02 | 2023-04-28 | 黑龙江大学 | Phase regulation type far-field super-resolution focusing and imaging device |
| CN114049869A (en) * | 2021-10-21 | 2022-02-15 | 西安交通大学 | Adjustable subwavelength acoustic imaging superlens |
| CN114049869B (en) * | 2021-10-21 | 2024-08-16 | 西安交通大学 | Adjustable sub-wavelength acoustic imaging superlens |
| CN114913842A (en) * | 2022-04-29 | 2022-08-16 | 浙江大学 | Difunctional acoustics plane superlens |
| CN114913842B (en) * | 2022-04-29 | 2023-03-24 | 浙江大学 | Difunctional acoustics plane superlens |
| CN117192795A (en) * | 2023-11-08 | 2023-12-08 | 浙江大学 | Optical waveguide optical module for edge-enhanced imaging and near-to-eye display device |
| CN117192790A (en) * | 2023-11-08 | 2023-12-08 | 浙江大学 | Achromatic vortex superlens and optical waveguide optical module for realizing edge enhancement imaging |
| CN117192795B (en) * | 2023-11-08 | 2024-04-05 | 浙江大学 | Optical waveguide optical module for edge-enhanced imaging and near-to-eye display device |
| CN117192790B (en) * | 2023-11-08 | 2024-04-09 | 浙江大学 | Achromatic vortex superlens and optical waveguide optical module for realizing edge enhancement imaging |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109102795B (en) | 2020-11-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109102795A (en) | A kind of acoustics super lens for realizing the imaging of depth sub-wavelength | |
| Huang et al. | Compact broadband acoustic sink with coherently coupled weak resonances | |
| Ge et al. | Breaking the barriers: advances in acoustic functional materials | |
| JP5521510B2 (en) | Optical deflection element | |
| Yuan et al. | On the coupling of resonance and Bragg scattering effects in three-dimensional locally resonant sonic materials | |
| KR101825480B1 (en) | Meta atom controlling acoustic parameters and metamaterials comprising the same | |
| Feng et al. | Negative refraction of acoustic waves in two-dimensional sonic crystals | |
| US9960497B2 (en) | Coil-based artificial atom for metamaterials, metamaterial comprising the artificial atom, and device comprising the metamaterial | |
| US8780010B2 (en) | Metamaterial provided with at least one spiral conductor for propagating electromagnetic wave | |
| Chiou et al. | Focusing and waveguiding of Lamb waves in micro-fabricated piezoelectric phononic plates | |
| Song et al. | Asymmetric absorption in acoustic metamirror based on surface impedance engineering | |
| Liu et al. | The spiral-labyrinthine acoustic metamaterial by coiling up space | |
| Chen et al. | Periodically alternated elastic support induced topological phase transition in phononic crystal beam systems | |
| KR101332293B1 (en) | Two-dimensional photonic crystal | |
| Huang | Silicon-based filters, resonators and acoustic channels with phononic crystal structures | |
| Ma et al. | Investigation of dual photonic and phononic bandgaps in two-dimensional phoxonic crystals with veins | |
| CN108680974B (en) | Tunable optical filter of surface plasmon waveguide | |
| Wang et al. | Surface waves in photonic crystal slabs | |
| Park et al. | Acoustic gradient-index lens using orifice-type metamaterial unit cells | |
| Mallejac et al. | Zero-phase propagation in realistic plate-type acoustic metamaterials | |
| US10122062B1 (en) | Crescent ring resonator | |
| CN109119059A (en) | A kind of double negative acoustic metamaterial structures based on the coupling of Helmholtz acoustic resonator | |
| Liu et al. | Negative refraction realized by band folding effect in resonator-based acoustic metamaterials | |
| Cicek et al. | Impacts of uniaxial elongation on the bandstructures of two-dimensional sonic crystals and associated applications | |
| Titovich et al. | Acoustic Poisson-like effect in periodic structures |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |